Ubuntu – Package temperature above threshold false alarms

lenovooverheatingtemperature

My kern.log has this kind of song and dance every 5 minutes:

Sep 10 20:56:41 cabron kernel: [99978.849080] CPU6: Core temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849081] CPU4: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849082] CPU0: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849082] CPU2: Core temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849083] CPU2: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849083] CPU6: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849118] CPU7: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849119] CPU5: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849120] CPU1: Package temperature/speed normal
Sep 10 20:56:41 cabron kernel: [99978.849120] CPU3: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.143135] CPU3: Core temperature above threshold, cpu clock throttled (total events = 1213)
Sep 10 21:02:58 cabron kernel: [100355.143136] CPU1: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143137] CPU7: Core temperature above threshold, cpu clock throttled (total events = 1213)
Sep 10 21:02:58 cabron kernel: [100355.143138] CPU5: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143140] CPU7: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143144] CPU3: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143177] CPU4: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143178] CPU0: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143179] CPU6: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.143180] CPU2: Package temperature above threshold, cpu clock throttled (total events = 4841)
Sep 10 21:02:58 cabron kernel: [100355.144334] CPU3: Core temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144335] CPU5: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144335] CPU1: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144336] CPU4: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144337] CPU7: Core temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144337] CPU0: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144338] CPU7: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144338] CPU3: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144376] CPU6: Package temperature/speed normal
Sep 10 21:02:58 cabron kernel: [100355.144376] CPU2: Package temperature/speed normal

Now, I'm running PSensors while using the machine, so I know what the temperature is. It's stable around 50 degrees C, with occasional slight bumps. I tend to never hear the fans run.

My questions are:

What's going on here?
What is the threshold temperature?
How can I stop this polluting my kern.log?

I'm running Ubuntu 18.04LTS on a Lenovo X1 Carbon running the latest 1.30 firmware. Previous firmware versions also exhibited this issue.

Best Answer

There is a probably a bug, but may this workaround helps you: https://github.com/erpalma/lenovo-throttling-fix

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Ubuntu – Set CPU temperature throttle threshold on Ubuntu/Thinkpad

There is a bug report filed against thermald:

Erratic behavior of CPU frequency control under load

People get the same errors you report:

Oct 14 22:30:59 p5520 kernel: [ 9481.033687] CPU3: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033688] CPU7: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033718] CPU1: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033719] CPU5: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033720] CPU0: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033720] CPU4: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033722] CPU6: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.033722] CPU2: Package temperature above threshold, cpu clock throttled (total events = 5845)
Oct 14 22:30:59 p5520 kernel: [ 9481.034709] CPU3: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034710] CPU0: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034711] CPU4: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034711] CPU7: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034738] CPU2: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034738] CPU6: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034739] CPU1: Package temperature/speed normal
Oct 14 22:30:59 p5520 kernel: [ 9481.034740] CPU5: Package temperature/speed normal

Comment #18 says to:

try running thermald in a window from command line.
systemctl stop thermald
#thermald --no-daemon --loglevel=info
Then do what triggers this, and attach the output of the above command.

If you decide the bug report fits your situation you can subscribe to the email notifications.

On my machine I can't duplicate the problem with thermald and tlp loaded. I opened five terminals and typed into each one:

while true ; do : ; done

All that happened is five cores are running at 100% and 3100 MHz. No throttling has occurred but it did make the two laptop fans run on low speed. Normally in Linux they are off (or at least I can't hear them). System temperature is 88 Celsius and keyboard is still responsive to type this answer. The living room does feel a bit warmer though...

Ubuntu – Unusually hot Asus UX391UA

Yes, I have the same. To avoid this I just install TLP and change in configuration

CPU_SCALING_GOVERNOR_ON_AC=performance
CPU_SCALING_GOVERNOR_ON_BAT=powersave
CPU_HWP_ON_AC=default
CPU_MAX_PERF_ON_AC=80
CPU_MAX_PERF_ON_BAT=50
CPU_BOOST_ON_AC=0
CPU_BOOST_ON_BAT=0
ENERGY_PERF_POLICY_ON_AC=balance-performance

And now my temperature not raising higher then 70 C.

BTW I have same issue on another Asus UX490UA, same solution helps

Best Answer

Related Solutions

Ubuntu – Set CPU temperature throttle threshold on Ubuntu/Thinkpad

Ubuntu – Unusually hot Asus UX391UA

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